SI9122 Vishay Siliconix, SI9122 Datasheet - Page 5

• Manufacturer Part Number: SI9122
• Description: 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Drivers
• Manufacturer: Vishay Siliconix

Notes
a.
b.
c.
d.
e.
f.
g.
h.
Document Number: 71815
S-41944—Rev. F, 18-Oct-04
SPECIFICATIONS
Output MOSFET DH Driver (High-Side)
Output High Voltage
Output Low Voltage
Boost Current
L
Peak Output Source
Peak Output Sink
Rise Time
Fall Time
Output MOSFET DLDriver (Low-Side)
Output High Voltage
Output Low Voltage
Peak Output Source
Peak Output Sink
Rise Time
Fall Time
Synchronous Rectifier (SRH, SRL) Drivers
Output High Voltage
Output Low Voltage
Break Before Make Time
Break-Before-Make Time
Peak Output Source
Peak Output Sink
Rise Time
Fall Time
Voltage Mode
Error Amplifier
Error Amplifier
Current Mode
Current Amplifier
Current Amplifier
X
Current
Refer to PROCESS OPTION FLOWCHART for additional information.
The algebraic convention whereby the most negative value is a minimum and the most positive a maximum (−40_ to 85_C).
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
F
Measured on SRL or SRH outputs.
See Figure 3 for Break-Before-Make time definition.
V
C
MIN
UVLO
BBM
when V
may be required to reduce noise into BBM pin for non-optimum layout.
Parameter
tracks V
CL_CONT
REG1
f
f
by a diode drop
at clamp level. Typical foldback frequency change +20%, −30% over temperature.
a
Symbol
I
I
I
SOURCE
SOURCE
SOURCE
t
t
t
t
t
t
t
t
I
I
I
t
t
V
I
V
V
BBM1
BBM2
BBM3
BBM4
d1DH
d1DH
d3DH
d3DH
V
SINK
V
SINK
V
SINK
d2DL
d4DL
BST
I
LX
OH
OL
t
t
OH
OL
t
t
OH
OL
t
t
r
f
r
f
r
f
T
T
V
V
Unless Otherwise Specified
Unless Otherwise Specified
A
A
T
T
INDET
INDET
= 25_C R
= 25_C, R
A
A
V
V
= 25_C R
= 25_C,R
f
f
LX
LX
Input to high-side switch off
Input to high-side switch off
NOM
NOM
Input to low-side switch off
Input to low-side switch off
= 7.2 V; 10 V v V
= 7.2 V; 10 V v V
C
C
Test Conditions
Test Conditions
= 72 V, V
= 72 V, V
SRH
SRH
= 500 kHz, V
= 500 kHz, V
Sourcing 10 mA
Sourcing 10 mA
Sourcing 10 mA
Sinking 10 mA
Sinking 10 mA
Sinking 10 mA
BBM
BBM
V
V
C
C
V
V
V
V
C
C
BBM
BBM
= C
= C
CC
CC
DH
DH
CC
CC
CC
CC
DL
DL
= 33 kW
= 33 kW,
BST
BST
SRL
SRL
= 10 V
= 10 V
= 3 nF
= 3 nF
= 10 V
= 10 V
= 3 nF
= 3 nF
= 10 V
= 10 V
= 33 kW L
= 33 kW, L
= V
= V
= 0 3 nF
= 0.3 nF
IN
IN
LX
LX
CC
CC
= 72 V
= 72 V
See Figure 3
See Figure 3
+ V
+ V
v 13.2 V
v 13.2 V
X
X
= 72 V
= 72 V
CC
CC
V
V
V
BST
CC
CC
Min
−1.1
0.75
0.75
1.3
− 0.3
− 0.4
− 0.3
b
−40 to 85_C
Limits
Typ
t200
t200
t200
t200
−100
−0.7
−1.0
−1.0
100
1.9
1.0
1.0
35
35
35
35
55
40
35
55
35
35
Vishay Siliconix
c
V
Max
LX
−0.75
−0.75
−0.4
2.7
0.3
0.4
+ 0.3
b
www.vishay.com
Si9122
Unit
mA
mA
mA
mA
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
V
A
A
V
V
A
A
V
V
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